Utah Administrative Code
Topic - Public Safety
Title R714 - Highway Patrol
Rule R714-162 - Equipment Standards for Heavy Motor Vehicle, Trailer and Bus Safety Inspections
Section R714-162-11 - Brakes
Universal Citation: UT Admin Code R 714-162-11
Current through Bulletin 2024-06, March 15, 2024
(1) When examining the brake system of a vehicle, the inspector shall:
(a) check to
ensure that the vehicle is installed with the required brakes;
(b) check the service brakes for proper
operation;
(c) check for broken,
missing, or loose components, brake lining air leaks in the brake chambers,
brake readjustment limits, mismatch across the steering axle of air chamber
sizes, and slack adjuster length;
(d) check wedge brakes for movement on the
scribe that exceeds 1/16 inch; and
(e) issue a rejection inspection certificate
when:
(i) there is absence of any braking
action on any axle required to have brakes upon application of the service
brakes such as missing brakes or brake shoes, failing to move upon application
of a wedge, S-cam, cam, or disc brake;
(ii) there are missing or broken mechanical
components such as shoes, linings, pads, springs, anchor pins, spiders, cam
rollers, push rods, or air chamber mounting bolts;
(iii) a brake lining is contaminated with
oil, grease, or brake fluid;
(iv) a
brake lining is broken, has a crack that exceeds 1-1/2 inch in length, has a
crack or void that exceeds 1/16 inch observable from the edge of the lining, or
a pad or lining is not firmly attached to the shoe;
(v) there are loose brake components such as
air chambers, spiders, and cam shaft support brackets;
(vi) there is an audible air leak at the
brake chamber, including a ruptured diaphragm or loose chamber clamp;
(vii) a brake is beyond adjustment limits
listed in tables or instructions in the Federal Motor Carrier Safety
Regulations;
(viii) a brake lining
has a thickness less than 1/4 inch at the shoe center for air drum brakes, 1/16
inch or less at the shoe center for hydraulic and electric drum brakes, and
less than 1/8 inch for air disc brakes on either the steering or non-steering
axles; or
(ix) there is a mismatch
across any power unit steering axle of air chamber sizes or slack adjuster
length;
(e) check the
parking brake system; and
(i) issue a
rejection inspection certificate when the brakes on the vehicle or combination
are not applied upon actuation of the parking brake control, including the
driveline hand controlled parking brakes;
(f) check brake drums and brake rotors for
damage, wear, and contamination; and
(i) issue
a rejection inspection certificate when:
(A)
any portion of the brake drum or rotor has any external crack or has any crack
that opens upon brake application, except for short hairline heat check
cracks;
(B) any portion of the
brake drum or rotor is missing or is in danger of falling away;
(C) there are fluids contaminating the
friction surface of either the brake drum or rotor;
(D) the inside diameter of the drum measures
more than the discard diameter stamped on the drum or more than OEM
specifications if drum is unmarked; or
(E) the thickness of a disc is less than the
minimum thickness stamped on the disc.
(f) check the brake hoses for any damage,
bulges or swelling, audible leaks, and proper fittings; and
(i) issue a rejection inspection certificate
when:
(A) a brake hose has any damage
extending through the outer reinforcement ply;
(B) there is color difference between cover
and inner tube;
(C) bulges or
swelling are evident when air pressure is applied;
(D) there are any audible air
leaks;
(E) two brake hoses are
improperly joined, such as a splice made by sliding the hose ends over a piece
of tubing and clamping the hose to the tube; or
(F) an air hose is cracked, broken or
crimped;
(g)
check brake tubing for any damage, leaks, and general condition; and
(i) issue a rejection inspection certificate
when:
(A) there are any audible air leaks;
or
(B) any brake tubing is cracked,
damaged by heat, broken, or crimped;
(h) check the low pressure warning device;
and
(i) issue a rejection inspection
certificate when:
(A) the low pressure warning
device is missing, inoperative, does not operate at 55 PSI and below or 1/2 the
governor cutout pressure, whichever is less, on a vehicle manufactured after
March 1, 1975; or
(B) the vehicle
does not have a visual warning device, if manufactured after March 1, 1975;
(i) check the
tractor protection valve or device on the power unit; and
(i) issue a rejection inspection certificate
when the tractor protection valve or device is inoperative or
missing.;
(j) check air
brakes and compressor for proper operation and condition; and
(i) issue a rejection inspection certificate
when:
(A) compressor drive belts are in a
condition of impending or probable failure;
(B) compressor mounting bolts are
loose;
(C) pulley is cracked,
broken, or loose; or
(D) a mounting
bracket, brace, or adapter is loose, cracked, broken, or missing;
(k) check electric
brakes and breakaway braking device; and
(i)
issue a rejection inspection certificate when:
(A) there is absence of braking action on any
wheel required to have brakes; or
(B) breakaway braking device is missing or
inoperable;
(l) check hydraulic brakes, including power
assist over hydraulic, engine drive hydraulic booster and dual hydraulic
circuits for proper operation; and
(i) issue
a rejection inspection certificate when:
(A)
The master cylinder is below the add line or less than 3/4 full;
(B) there is no pedal reserve when the engine
is running except by pumping the pedal;
(C) the power assist unit fails to
operate;
(D) a brake hose is
seeping or swelling under application of pressure;
(E) the check valve is missing or
inoperative;
(F) hydraulic fluid is
observed leaking from the brake system;
(G) a hydraulic hose is abraded (chafed)
through the outer cover to the fabric layer;
(H) fluid lines or connections are leaking,
restricted, crimped, cracked, or broken; or
(I) brake failure or low fluid warning light
is on or inoperative;
(m) check the Vacuum Braking System for
proper operation.
(i) issue a rejection
inspection certificate when:
(A) there is
insufficient vacuum reserve to permit one full brake application after the
engine is shut off;
(B) a vacuum
hose or line is leaking, restricted, abraded (chafed) through the outer cover
to the cord ply, crimped, cracked, broken, or collapsed when vacuum is applied;
or
(C) the low-vacuum warning
device is missing or inoperative; and
(n) check for leaking wheel seals; and
(i) issue a rejection inspection certificate
when a wheel seal is leaking.
Disclaimer: These regulations may not be the most recent version. Utah may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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